Rules of the Air - Updated
 
Following discussion with the BHPA Senior Technical Officer, Dave Thompson, it has been agreed to update the rules governing rights of way in the air when flying in thermals. The old Rules of the Air webpage included the following advice:
"Overtaking While Climbing: When two gliders are sharing a thermal, the lower glider has the right of way. The upper glider must give way to the lower glider and allow it to climb through, as the lower glider cannot see the gliders above it."
This advice appears to be a hang-over from a time before paragliding developed as a sport and was a reasonable precaution at the time. This advice does not take into account the restricted downward view that paragliders (and sailplanes) experience and it has been decided, in the interests of safety, to remove this outdated advice from the Rules of the Air webpage.
 
All pilots should note: The primary rule of the air still applies in this situation -
SEE AND AVOID! It is the responsibility of all pilots to take all possible measures to avoid a collision with another glider.
Pilots sharing a thermal must always be mindful that other pilots in the thermal may not have seen them or that they may be unable to manoeuvre to take avoiding action. Pilots must always exercise caution and courtesy when flying in proximity to other gliders.
 
Philip Lardner
IHPA Training & Flight Safety.